Lectures on Jurisprudence: Or The Philosophy of Positive Law is a book written by John Austin in 1874. The book is a comprehensive study of the philosophy of positive law, which is the legal system that is created and enforced by the state. Austin's lectures cover a wide range of topics, including the nature of law, the sources of law, the different types of law, and the principles of legal interpretation. The book is divided into four parts, with...